Laminar Flow over an equilateral triangular cylinder is studied for several inflow angles. Under an uniform flow of $Re_d$=50,75,100,125,150, the triangular cylinder is rotated by ${ heta}$=$0^{circ}$,$15^{circ}$,$30^{circ}$,$45^{circ}$,$60^{circ}$,$75^{circ}$,$90^{circ}$,$105^{circ}$. The governing equations are solved by the PISO algorithm based on the finite volume method of the unstructured grid system. The effects of the inflow angle on the vortex-shedding flows are investigated. The Strouhal number shows a minimum at ${ heta}$=$60^{circ}$. It is closely related to the variation of pressure and flow structure induced by the movement of separation points.